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Webasto Thermo 90 ST and Thermo Pro 90 Water pump U4840 Genuine Webasto replacement part Replaces 1300717A and 9010618A (U4846) For use with Thermo 90 ST and Thermo PRO 90 24v heaters Water pump harness required for 90 ST installations - 1318928A (click here) 24 volt only